feat(koa): Adds support to ignore a span by its layer name

[MrFabio]

Which problem is this PR solving?

• Adds ignoreLayersName option to instrumentation constructor config to allow layers to be ignored by its name.
• Currently we have the ignoreLayersType config, this new one will run after this check.
• It is useful if we want to ignore some layers like logger, allowedMethods, and some ones with no name. It also helps with reducing the number of spans.

Short description of the changes

• Defines KoaInstrumentationConfig with ignoreLayersName which is an array of string (layer names):
• Utils module with isLayerNameIgnored to check if a layer should be ignored by the name
• Modifies _patchLayer to check if the layer is ignored by the config

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: MrFabio / name: Fábio Gomes (66649b9)

[codecov]

Codecov Report

Attention: Patch coverage is 96.15385% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.80%. Comparing base (2dc302c) to head (66649b9).

Files with missing lines	Patch %	Lines
...lemetry-instrumentation-koa/src/instrumentation.ts	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2028      +/-   ##
==========================================
+ Coverage   90.78%   90.80%   +0.01%     
==========================================
  Files         169      169              
  Lines        8055     8077      +22     
  Branches     1643     1649       +6     
==========================================
+ Hits         7313     7334      +21     
- Misses        742      743       +1     

Files with missing lines	Coverage Δ
...ode/opentelemetry-instrumentation-koa/src/types.ts	100.00% <ø> (ø)
...ode/opentelemetry-instrumentation-koa/src/utils.ts	100.00% <100.00%> (ø)
...lemetry-instrumentation-koa/src/instrumentation.ts	94.04% <75.00%> (-1.08%)	⬇️

[MrFabio]

Updated ✅